Keanu Reeves as Shadow the edgehog. lol [link]

This is also good for starters [link]

I show them Torsofuck.

There's also Prong with albums like Rude Awakening that's not to aggressive and catchy.

Rammstein is good because their not always heavy and they have a bit of variety and a bit different from your standard metal sound

When introducing friends to metal, my approach is to choose the most prolific musicians among my favorites, like Devin Townsend or Dan Swanö and then play their most accessible projects/albums. It has worked well.

and aren't approaching metal from the same perspective, so really you just have to figure out something that would be palatable to an individual person you're dealing with. I think there are better choices out there.